Sega Model 3 (Blast, NVS4000, etc) no JAMMA sound / buzzing fix

[snakeGrave]

I think you’ll have a hard time confirming a specific I resistor. Pretty sure when I did this I just grabbed one from the bottom of my workbench drawer. The 10ohm one rated for 1w that Nem shared should be perfect for this

 

[Kidkaos]

my setup is all good, no buzz, after replacing the resistor and rewiring it

What resistor did you get? And where at?

 

[snakeGrave]

What resistor did you get? And where at?

Probably RadioShack… RIP

 

[hardyhell]

I have a question about the wiring for mono sound pcb boards to use with that psu. My friend has this ground loop plug in the sound in connector. Mono sound actually works like this. But is it ok to use or damage incoming?

 

[kazuo]

I'm super late to this party, but I am pretty sure that loopback wire is supposed to be in there. It's how you get mono sound.

You only remove it when you want to use the amp for stereo sound. You connect to line level output using a 4 pin to RCA harness. See here.

 

[hardyhell]

I'm super late to this party, but I am pretty sure that loopback wire is supposed to be in there. It's how you get mono sound.

You only remove it when you want to use the amp for stereo sound. You connect to line level output using a 4 pin to RCA harness. See here.

Cool. Thanks for the information. I will try that loop then.